# Use constants with units

If you need to use constants with units in an expression, do the following:

The following only applies to Tedds for Word.

Example:

The beam
*x* has a fixed length 14.5 m, and is subdivided into a variable number of equal spacings,
*s*.

Do not write the calculation as follows:

*s = 10*

*x = 14.5 m/s = ? **

* In the above expression,
Tedds for Word considers
*m/s* as the unit
*meters per second*, and not the intended calculation (14.5 m divided by 10 spacings).

To ensure that Tedds for Word performs the calculations as you intend, place the constant and its unit within brackets as follows:

*s = 10
*

*x = (14.5 m) / s = 1.45 m = ?
*

When the revised expression is calculated, it gives the correct answer:

*x = (14.5 m) / s = 1,45 m*